Two G.I.s are trapped on a Japanese held island after their entire battalion has been slaughtered. One of the men is severely wounded and the two are forced to develop a symbiotic relationship out of desperation and loneliness. This camaraderie explodes into an angry confrontation when old racial prejudices surface. Based on a story by Philip Roth, this dramatic war story was directed by Joel Rapp in Puerto Rico. Made at the same time that Roger Corman was filming Last Woman on Earth and Creature from the Haunted Sea, Battle of Blood Island utilizes many of the same outdoor locations and crew members. Roger Corman himself makes a cameo appearance as a soldier in the film's dramatic conclusion.

In order to meet the challenge of a Japanese bombing of their island outpost, two soldiers, a Christian and a Jew, must put aside their differences and find a way to work together.